This looks like alot of fun I also want to make a deck utilizing a slumbering dragon because I think it would be beastly to get some big beats in fairly early on, I was thinking of doing a red/green aggro with some ramp and using Increasing Savagery to have a turn 3 dragon heading out to make friends and running a few Bond Beetle s for those early +1's, but looking at this I see some other cards that your using that are a definite must to make the big guy wake up from his nap, this deck seems like alot of fun, hope you post some of your results from using it.
the only problem with this deck is a Doom Blade easily takes care of the Dragon. You can't put so much focus on putting counters on your dragon. I've actually considered a deck where I used slumbering dragon for control, with Blood Reckoning , card:Norn's Annex, and Call to the Grave , but I can't think of many more ideas for it. That way you dont have to put all of your focus on the dragon.
No-one's ever going to allow the dragon to wake up. It's similar to all one drop powerhouses. It's best just to use it as removal distraction,